短語詞組短語parabolic c mirror 拋物面鏡parabolic mirror control 拋物柱面鏡控制axis parabolic mirror 離軸拋物面反射鏡rigid parabolic mirror 剛性拋物面反射鏡off -axis s parabolic mirror 離軸拋物面反射鏡 返回 parabolic mirror